On Windows 10 PCs with unlinked Microsoft account (but logged-in Store), the bug seems to also affect MS purchases, so at startup you only get Globals that are part of your Collection. So, this bug affects Windows 10 unlinked users AND Nintendo Switch retail users.
Windows 10 fully-linked users and Nintendo Switch digital users seem unaffected by this bug. Shot on the right is original MC, for comparison of "expected vs got".
the blue buttoned main menu is the "expected result" at startup. (used Win10 to show because, as explained in OP, bro took the NS)
On Windows 10 PCs with unlinked Microsoft account (but logged-in Store), the bug seems to also affect MS purchases, so at startup you only get Globals that are part of your Collection. So, this bug affects Windows 10 unlinked users AND Nintendo Switch retail users.
Windows 10 fully-linked users and Nintendo Switch digital users seem unaffected by this bug. Shot on the right is original MC, for comparison of "expected vs got".